2d3a2a52b8
The EGL context can only import and blit an EGLImage if the backing DMA buffer has a format modifier combination that is advertised as supported and not marked as "external_only". When the context can't blit the imported image, we can still paint using it GL_OES_EGL_image_external using the texture target GL_TEXTURE_EXTERNAL_OES. However, treat drivers who doesn't support modifiers at all as if they do support blitting, if the modifier is 'linear', to avoid regressions. [jadahl: Make shader path a fallback to allow hardware to utilize copy engines via blitting] Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/6221 Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2247 Related: https://launchpad.net/bugs/1970291 now only falls back if modifiers are supported, and they mark linear as export only. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3304>
Mutter
Mutter is a Wayland display server and X11 window manager and compositor library.
When used as a Wayland display server, it runs on top of KMS and libinput. It implements the compositor side of the Wayland core protocol as well as various protocol extensions. It also has functionality related to running X11 applications using Xwayland.
When used on top of Xorg it acts as a X11 window manager and compositing manager.
It contains functionality related to, among other things, window management, window compositing, focus tracking, workspace management, keybindings and monitor configuration.
Internally it uses a fork of Cogl, a hardware acceleration abstraction library used to simplify usage of OpenGL pipelines, as well as a fork of Clutter, a scene graph and user interface toolkit.
Mutter is used by, for example, GNOME Shell, the GNOME core user interface, and by Gala, elementary OS's window manager. It can also be run standalone, using the command "mutter", but just running plain mutter is only intended for debugging purposes.
Contributing
To contribute, open merge requests at https://gitlab.gnome.org/GNOME/mutter.
It can be useful to first look at the GNOME Handbook and the documentation and API references below first.
Documentation
- Coding style and conventions
- Git conventions
- Code overview
- Building and Running
- Debugging
- Monitor configuration
API Reference
- Meta: https://mutter.gnome.org/meta/
- Clutter: https://mutter.gnome.org/clutter/
- Cally: https://mutter.gnome.org/cally/
- Cogl: https://mutter.gnome.org/cogl/
- CoglPango: https://mutter.gnome.org/cogl-pango/
- Mtk: https://mutter.gnome.org/mtk/
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.